FS#7912 - Voice enable chessbox plugin

This patch depends on FS#7704.It voice enables the chessbox plugin.Both the game play and the PGN viewer mode can be used eye-free with this patch.The viewer could use some more care, I’ll provide updates as my local version changes.This patch is probably not fit for inclusion yet, we’d need to figure out a way to provide plugin specific lang/voice files first.It is being posted here because it has prooven very useful to me and some friends in the past, and can be used as-is on targets that are not that tight on memory and can rebuild their own .voice files.

“we’d need to figure out a way to provide plugin specific lang/voice files confused. This is a plugin that reads the position and piece on that space for those with imperfect memories. That seems a trivial task. Each time the cursor’s location changes, the chessbox program reads it, so there are 8 letters and 8 numbers that need to be read. This feature is already part of the voice-reading package and english.voice, since it can spell out the song for you. You need a few more words, like “checkmate,” “check”, castle, “king”, “pawn”, etc., but not many. So any tts program can generate these extra words, no?